Refrigerating apparatus



April 12, E938. J. R. STEPHENSON- REFRIGERATING APPARATUS Original Filed April 26, 1933 .7/74? 1mm??? u V" pressor may be of any compressor i6 any desired manner.

Patented Apr. 12, 1938 UNITED STATES REFRIGERATDIG APPARATUS James R; Stephenson,

by mesne assignments,

Dayton, Ohio, assignor,

to General Motors 001'- poration, a corporation of Delaware Application April 26, 1933, Serial No. 667,991 Renewed December 3, 1936 11 Claims. (01. zen-23a) This invention relates to refrigeration and more particularly to a refrigerating system in which the motor and compressor are assembled as a unit within a resonant casing.

An object of this invention is to provide proper heat dissipating means for the motor-compressor but in such a manner that, undue noises heretofore produced in units of this kindare obviated. f

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein a preferred form oi the present invention is clearly shown.

In the drawing:

Fig. l is a view partly in perspective, partly in cross-section, and diagrammatic of a system embodying features of my invention;- and" Fig. 2 is a horizontal cross-section taken transversely of a pair of fins.

A refrigerating system embodying featuresof my invention comprises in general amotor-compressor unit iiil, which delivers compressed refrigerant to a condenser II, where the refrigerant is liquefied and from whence it passes through ,the line i2 to an' evaporator i3 through an expansion device it, in which evaporator the refrigerant is evaporated and returns through the iineli to the unit l0.

The motor-compressor compressor i6 and a motor sheet metal casing 18. The motor and comdesired form. Thus the may be of the rotary'type, and the motor I! may include a stator l9 supported directly on casing l8 and a rotor rotatably disposedwithin the casing. The casing Iii maybe unit In may include '8.

provided with fins 2i and 2i which are radially disposed along the and are secured thereto in Thus each pair of fins 2i and 2| may be joined by an internal flange 22 which may be spot-welded to the casing Ill. The outer extremities of each of the fins 2! may be in the form of a flange 23 which is directed towards a similarly disposed flange 23' of the adjacent fin 2! which thus form a series of pairs of fins cylindrical casing ill with flanges directed towards each other circumferentialiy arranged around the. casing i8.

'The fins are provided with vibration damping means to prevent the noise producing vibrations which exist in these fins, the action of which has hitherto been undiscovered. The vibration unit of the system 'in the form of fins,

i1 within a hermetic damping means may be in the form of wooden strips 24 bridging the extremities of the fins. A convenient form of strip is one having notches 25 at opposite sides through which the ends of the flanges 23 and 23' may pass while the strips 24 are being driven longitudinally between the flanges. Thus, the fins 2!, 2l( together with the strips 24 form non-resonant heat radiating means for the compressor.

In operation the'heat of the motor-compressor unit is dissipated through the fins'2l and 2i by air passing upwardly along and between the fins. The action of the motor and compressor is such that vibrations, in units not embodying my invention, are created on these fins, particularly if such in order to reduce their cost. These vibrations, I find are very effectively dampened by the use of the wooden strips as heretofore described and thus the quietness ofthe unit is very materially enhanced.

While the form tion as herein disclosed, constitutes a preferred form it is to be understood that other forms might be adopted. all coming within the scope of the claims which follow.

What is claimed is as follows:

1. A motor-compressor unit'for refrigerating systems and the like having a motor, a compressor, a hermetically sealed casing around said motor and compressor, radially directed fins on said casing, said fins having flanges directed towards each other at their outer extremity, and vibration damping means said flanges.

2. A motor-compressor unit having a motor, a compressor, a cylindrical hermetically sealed casing'around said motor and compressor, radially directed fins parallel to the axis of said cas-- ing disposed'about the periphery of said casing, and wooden members bridging the outer extremities of said fins.

3. A motor-compressor unit having a motor, a

' compressor, a cylindrical hermetically sealed casfins are made of sheet metal of embodiment of the invenfor said fins bridging,

4. A motor-compressor unit for refrigerating systems and the'like having a motor, a compressor a hermetically sealed casing around said motor and compressor, radially directed fins on non'-resonant material bridging said flanges.

6. A motor-compressor unit for refrigerating systems and the like having a motor, a compressor, a hermetically sealed casing around said motor and compressor, radially directed fins on said casing, saidfins having flanges directed towards each other at their outer extremity, and

vibration damping means for said fins formed of non-resonant material bridging said flanges and maintaining said fins under permanent stress.

7. A motor-compressor unit having, a motor, a compressor, a cylindrical hermetically sealed casing around said motor and compressor, radially directed fins parallel to the axis of said casing disposed about the periphery of said casing, said fins having tangentially disposed flanges forming the outer extremities of said fins, and

members bridging the outer extremities of said fins, said members comprising non-resonant material.

8. A motor-compressor unit having a motor, a compressor, a cylindrical hermetically se ed casing around said motor and compressor, radially directed fins parallel to the axis of said casing disposed about the periphery of said casing, said fins having tangentially disposed flanges forming the outer extremities of said fins, and members bridging the outer extremities oi said fins,-

said members comprising material having a resonance different from the material of said fins.

9. A motor-compressor unit having a motor, a compressor, a cylindrical hermetically sealed casing around said motor andcompressor, radially directed fins parallel to the'axis of said casing disposed about the periphery of said casing, and non-metallic members bridging the outward extremities of said fins.

10. A motor-compressor unit having a motor, a compressor, a cylindrical hermetically sealed casing around said motor and compressor, radially directed fins parallel to the axis of said casing disposed about the periphery of said casing, said fins having tangentially disposed flanges forming the outer extremities of said fins, and non-metallic members bridging the outerextremities of said fins, v 11. A motor-compressor unit having a motor, a compressor, casing means for said motor and compressor, heat radiating fins on said casing, and non-resonant members bridging the outer extremities of said fins. Y

' JAMES R. STEPHENSON. 

